ARM: multi_v7_defconfig: Enable AHCI_IMX

The Wandboard Quad comes with a SATA port. Enable the IMX SATA driver by
default to make it easy to have the root filesystem on it.
Signed-off-by: Tuomas Tynkkynen <tuomas@tuxera.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/configs/multi_v7_defconfig

@@ -220,6 +220,7 @@ CONFIG_SATA_AHCI=y
 CONFIG_SATA_AHCI_PLATFORM=y
 CONFIG_AHCI_BRCM=y
 CONFIG_AHCI_ST=y
+CONFIG_AHCI_IMX=y
 CONFIG_AHCI_SUNXI=y
 CONFIG_AHCI_TEGRA=y
 CONFIG_SATA_HIGHBANK=y